UBUNTU-CVE-2026-57164

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UBUNTU-CVE-2026-57164

Summary:

Details: PJSIP is a free and open source multimedia communication library written in C. Prior to commit 8d5956a, a heap buffer overflow exists in the PJLIB-UTIL HTTP client (http_client.c) when buffering an HTTP response body. This affects applications that use the PJLIB-UTIL HTTP client to receive a whole response body at once (a completion callback with no incremental on_data_read callback). When growing the response buffer, an incorrect size calculation based on the server-supplied Content-Length can leave the buffer too small, causing response data to be written past the end of the allocation. A malicious or man-in-the-middle HTTP server can trigger this with a crafted response; impact may range from unexpected application termination to memory corruption. Applications that consume the response incrementally (via on_data_read), or that only connect to trusted servers, are not affected. This issue has been patched via commit 8d5956a.

References: https://ubuntu.com/security/CVE-2026-57164, https://www.cve.org/CVERecord?id=CVE-2026-57164, https://github.com/pjsip/pjproject/security/advisories/GHSA-59fr-724j-6fjv